The General Motors and Chrysler bankruptcies could mean an additional 12,280 jobs lost, according to the report, among dealerships and production facilities.

It’s impossible to predict the full extent of the impact, according to the report, because GM hasn’t made public how many of the 3,000 salaried jobs and 2,200 to 2,500 dealerships it plans to cut are in southeast Michigan.

The effect will likely spill beyond the auto industry, SEMCOG says. An additional 1.26 jobs could be lost for every automotive job lost, according to the report, in industries like suppliers, services or restaurants.